Update root certs to use NSS 3.47
Updated the root certs to use NSS 3.47 @sam-github asked me to do this.
Followed instructions here - https://github.com/nodejs/node/blob/master/doc/guides/updating-root-certs.md
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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